SWF Compressor

How to Compress Flash movies and reduce SWF file size

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This page is about SWF Compressor for Windows

For Mac version click here

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Build Info
File size:
Latest build:
Release date:
27th February, 2008
Build compiled:
27th February, 2008
Compatible with:
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compress flash

Want to know how to compress SWF files?

Anyone who is involved in creating or administrating websites can face the problem of content being too big in size, specifically SWF banners, movies or slide shows.

If you are looking for a solution that will help you reduce SWF file size you are at the right website! You don't even have to know Flash technology well to compress Flash files. SWF compression with Flash Optimizer by Eltima will not only solve the file weight issue easily and quickly, but also with a high quality, because SWF file can be reduced up to 60-70% and depending on the file properties it can be done with no quality loss.

Flash Optimizer is the only SWF compression tool that fully supports Flash 5, 6, 7, 8, 9 and Flash 10 (CS4).


Full features list:

  • Revolutionary compression methods that allow to optimize SWF files to save up to 70% of their original size
  • Vectors & curves optimization
  • ZLib compression (can be applied and removed)
  • Shapes optimization
  • Morphing optimization
  • Fonts optimization
  • Zero-objects optimization
  • Sounds compression
  • Embedded video compression
  • Intuitive Flash movies manipulation
  • Easy preview and interactive comparison of the original and compressed movies
  • Simple and Advanced optimization settings - customize every compression option
  • Customizable optimization settings presets (compatible with Mac version of Flash Optimizer)
  • Batch compression mode
  • Command-line interface (available in Business and Company licenses)
  • Detailed logging of every event that takes place during compression

Demo version limitations:

  • Though you will still see the optimized file preview in color, optimized files will be saved in black and white palette in Demo version.

Interface languages:

German English French Spanish

Compatible with:

  • Windows XP (32-bit and 64-bit)
  • Windows 2003 (32-bit and 64-bit)
  • Windows 2008 (32-bit and 64-bit)
  • Windows Vista (32-bit and 64-bit)
  • Windows 7 (32-bit and 64-bit)
  • Windows 8 (32-bit and 64-bit)
  • Windows 10 (32-bit and 64-bit)
  • Windows server 2012

So here's how to compress SWF files with SWF Compressor by Eltima

1. Download Flash Optimizer right from this page and install it on your computer following easy and familiar installation steps.

2. Choose whether you want to compress one SWF file or many of them at once by switching to the corresponding tab. Then either browse for the one SWF file you are going to compress or add the multiple tasks to the tasks list.


3. Select the folder where you want compressed movies to be saved to and in case you are compressing one file, select the new name for it. By default "opt" suffix will be added to original file name.


4. For your convenience Flash Optimizer features selection of predefined optimization settings: Sprite, Medium, Basic, Good and Best. Just select one of them and you are good to start optimizing. You also have an option to load Custom optimization settings if you already have ones and saved them to a file before. And if you feel like digging deeper into each setting, just press the arrow down and you will be able to choose more profound and fine settings up to your needs.

compress swf

5. After all settings are applied you can preview the output before starting the compression itself. Press "Preview compression" button to see the file details and compare the original file with the compressed one.



Press "Compress" button to start optimization process.

Demo-version of Flash Optimizer is available for download.
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